Dustin does look shook. It almost seems like he's accepted that McGregor is better than him.
Dustin has a strong ground game and amazing darce choke.. We have seen McGregor stunned and submitted before with Nate. He was in camp for a title fight at the time and still gassed.
I still believe McGregor will win, but if Dustin could use grappling to tire him out and mitigate damage in the early rounds he could have a path to victory there.
Food for thought